The utility model relates to a detachable isolation switch. The switch comprises a base and a moving contact. Wherein two insulating columns are installed on the base in a spaced mode, a first conductive plate and a second conductive plate are arranged at the top ends of the two insulating columns respectively, a hanging base is arranged on the first conductive plate, the second conductive plate and the first conductive plate each comprise a vertical plate and two touch plates installed on the vertical plate, and the middle section of each touch plate is hinged to the vertical plate; the moving contact comprises two conductive blades which are arranged at an interval; one ends of the two conductive blades are hung on the hanging seat, the other ends of the two conductive blades are detachably fixed on the second conductive plate through a lock catch assembly, the two conductive blades are clamped and contacted on the two contact plates of the first conductive plate and the two contactplates of the second conductive plate when the switch is switched on, and the moving contact is also provided with a dismounting sleeve. The contact is good during working, the conductivity is stable,the structure is simple, and the service life is long.